DeepStream NvDsAnalytics App Save Detected Objects as Images

[nisyhaal]

• Hardware Platform (Jetson / GPU) : Tesla P4
• DeepStream Version : 6.1
Hi, has anyone tried modifying deepstream_nvdsanalytics_test application to save the detected objects as images?

[Fiona.Chen]

Please refer to the sample of saving the detected objects as images here: /opt/nvidia/deepstream/deepstream/sources/apps/sample_apps/deepstream-image-meta-test

[nisyhaal]

I tried modifying the nvdsanalytics_src_pad_buffer_probe in the deepstream-nvdsanalytics-app by adding the image saving code snippet from the deepstream-image-meta-test but I’m not able to run the application

[nisyhaal]

In the deepstream-image-meta-test the images are encoded in the pgie_src_pad_buffer_probe and saved in the osd_sink_pad_buffer_probe. How do I implement this in the deepstream-nvdsanalytics-test-app?

[yuweiw]

There is no update from you for a period, assuming this is not an issue anymore. Hence we are closing this topic. If need further support, please open a new one. Thanks

They are similar. You can get the nvbufsurface in the probe function and get the paras from the for loop:

  GstBuffer *buf = (GstBuffer *) info->data;
  GstMapInfo inmap = GST_MAP_INFO_INIT;
  if (!gst_buffer_map (buf, &inmap, GST_MAP_READ)) {
    GST_ERROR ("input buffer mapinfo failed");
    return GST_PAD_PROBE_DROP;
  }
  NvBufSurface *ip_surf = (NvBufSurface *) inmap.data;

  for (l_frame = batch_meta->frame_meta_list; l_frame != NULL;
      l_frame = l_frame->next) {
   .......
  }